It seems there is an issue with the arrow head, I'll try to investigate it for now try running it without it
=========================== v := RTView new. e1 := (RTEllipse new size: 20) elementOn: 'hello'. e2 := (RTEllipse new size: 20) elementOn: 'world'. e1 @ RTDraggable. e2 @ RTDraggable. l := RTEdge from: e1 to: e2. l + (RTLine new color: Color red). "l + (RTSimpleArrowHead new color: Color red)." e2 translateBy: 60 @ 80. v addAll: (Array with: e1 with: e2 with: l ). e1 @ RTLabelled. e2 @ RTLabelled. "Note that the RTLabelled interaction has to be set after having added the element in the view" l @ (RTLabelled new text: 'lining up!'). v open ========================= As far as documentation goes, it is still heavily work in progress, so right now Agile Visualization is probably the best source (and of course mailing list).
